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How should Hong Kong address the global sand shortage?


Sand resources seem essentially limitless, but in reality the world is running out of sand. Hong Kong, as a developed city with continuous construction projects, cannot stay out of the crisis. This article will analyse the reasons of sand shortage, the impacts of sand mining and the possible way to solve the crisis.

Raindrop: A new technique to generate electricity?


Hydropower is derived not only from the energy of running water, it can also be converted from kinetic energy generated by waves, tides, and even raindrops. Scientists in Hong Kong have developed a droplet-based electricity generator which can light up 100 small LED light bulbs by a drop of water. Can droplet energy be widely adopted in Hong Kong?

Is water recycling a solution to tackle water scarcity in Hong Kong?


Dongjiang River is Hong Kong’s major source of water. However, the flow of Dongjiang has been gradually decreased because of climate change in recent years, raising concern over the stability of fresh water supply. A feasible approach to solve the problem is to replace part of the fresh water supply by reclaimed water.

‘Save’ renewable energy, save the world


Global warming poses a threat to human well-being. In recent years, some countries have ramped up generating electricity from renewables. However, due to its unstable supply, building a reliable system is vital to support the storage and timely provision of electricity to reduce our dependence on fossil fuels.

Is there a gender gap in practising environmental protection?


Environmental protection is a shared responsibility. However, a survey found that the proportion of women practising environmentally friendly behaviour is generally higher than that of men. Some studies suggest that the difference reflects gender stereotypes in family roles and the threat of gender identity. What is the rationale behind those studies? What is the best strategy to promote environmental protection if such argument is established?

Overseas experience in regulating light nuisance


The spectacular nightscape is one of the major sources for the light nuisance of Hong Kong. In a bid to encourage self-regulation, the Government has launched the ‘Charter on External Lighting’, which however has achieved limited success. Can Hong Kong find a way out by making reference to overseas experience on regulation, installation standard and exemption?

The flygskam movement: Less flight to fight against climate change


In order to reduce the impact of carbon emissions on climate change, an anti-flying movement started in Sweden has encouraged people switching from planes to other low-carbon vehicles when travelling overseas. How do the aviation industry and tourism-oriented countries deal with challenges arising from the movement? Is it possible for tourists to put low-carbon travel into practice?

Ecology protection: Three ways to curb tourist vandalism


Irreplaceable natural resources at tourist spots may sometimes be vandalised as ‘souvenirs’ by some travellers, even though many places including Hong Kong have rules stipulating that depredation of the environment is prohibited. Overseas experiences of protecting natural resources through penalty, security and education may shed light on the city’s endeavour to protect ecology.

Is Hong Kong ready for more frequent extreme rainfalls?


Global warming has resulted in more frequent extreme rainfalls around the world, and Hong Kong is no exception. In addition to flooding, extreme rainfalls can trigger natural hazards such as landslides and debris flows, which should not be neglected. However, disaster prevention should not be the sole responsibility of the Government. Citizens should also fulfill their civil responsibility to reduce adverse impacts of natural hazards, and learn how to respond to it.